Electric switch.



mammal) MAR. 10, 190% mm 83mm ELEGTBIG iEWITSE. A\YPLIOATIGN FILED MAE. 7: 1905.

IN VENTQR.

ATTORNEY,

UNITED STATES PATENT OFFICE.

EVERETT M. COFFIX, OF OAKLAND, CALIFORNIA.

ELECTRIC SWITCH.

T all whom it may concern:

Be it known that I, EvERETT M. COFFIX,

a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Electricaside elevation of the device; Fig. '2 is a vertical section on the line 22 of Fig. 4;

Fig. 3 is a vertical section on the line 3+3 of Fig. 4; ,Fig. 4 is a horizontal section on the line 4-4 of 1; F ig. 5 is a perspective view of the controller; Fig. 6 is a perspective view of the shifter; Fig. 7 is a broken sectional view showing a modification of the hooks.

Referring to the drawing, 1 represents the supporting plate, which is of the usual form,

and is generally placed within a porcelain casing supporting thesp'ring contacts closedwide bearing on the shaft by bending it into,

by the switch, but as these form no part of the present invention they are here omitted.

Said plate is formed with the usual apertures to receive the push buttons 2, formed upon the outer ends of stems 3-, theinner ends of which are pivoted to the ends of the arms -1 of a controller 5 loosely pivoted upon a shaft 6. To support said shaft 6 there is rovided a U-shaped piece 7 of sheet metal, t 1e central portion of which is riveted to the plate 1, as shown at 8, while the side members form posts and are apertured, one 9 atits end and the other 10 near its end, to form bearings for said shaft. The member 10 is extended and expanded in width beyond said aperture and has a curved guideway 11 for an arm of the shifter 12, hereinafter described. The extreme end 13 of said member can fit in a recess in the porcelain casing, not shown, for the purpose of forming a firm guide for the contact plate 14', so as to insure contact with the contact springs carried by the porcelain casing.

T he controller is constructed to have a a U-s-hape, or so as toh'ave side members and a bridge'connecting them, the side members both being erforated to ermit the shaft 6 to pass loose y therethroug' With the same Specification of Letters Patent.

Application filed March 7, 1906. Serial No. 304,652.

Patented March 10, 190B.

REISSUED object the shifter 12 is given the same general form and its side members are perforated to permit the shaft 6 to pass loosely therethrough. Around the shaft 6 is a coiled spring 15 the ends of which are adapted to-be" engag'edby arms 16 and 17 of the controller 1 and shifter respectively, each extending inwardly from one side member towards the.

op )osite side member of the shifter or con tro ler, as the case may be. The'arm 17 moves in the guideway 11, being arrested by the ends thereof, and engages the contact plate 14 swinging on the shaft .6.

The coiled spring lies between the side members of the shifter, while these lie between the side members of the controller.

For the sake. of lightness and convenience of construction the side members are joined by two bridges instead of one and the outer edges of these bridges form lips 18 which are alternately engaged by hooks 19 pivoted upon ashaft 20 secured between the sides of the piece7 near the plate 1, and connected by a spring 21 which tends to draw both of them inwards towards the controller. In the modification shown in Fig. 7 the two books are made" out of a single piece of spring metal bent into a U-sha ed form, the central portion 22 being rivete between the plate 1 andthe piece 7.

The following is the operation of the device. Pressure being applied to whichever push button extends outermost, the controller is thereby rocked upon the shaft,

carrying with it an end of the coiled spring and thereby energizingv said spring, since the other end of the coiled spring is held immovable by the arm 17 of the shifter a ainst which it presses, said shifter being held back by the hook l -engaging the lip 18 ofthe shifter at the side from which the controller is moving. In the meantime the edge of the central ortion of the cont-roller abuts against J; 1e shank of said hook and presses the hook away from the shifter. As soon as said hook by said movement is thrown off the lip of the shifter, the spring immediately expands and the end engaged by the arm. of the shifter throws the shifter the extent of its path. The opposite lip 18 of the shifter is now engaged b shifter is now in t e same position as before I relatively to theother button.

The provision of the spring-actuated the other hook, and they hooks, and the means for positively pushing either hook awayfrom the shifter to allow it to rock .isiadvantageou's, since it enables the controller and shifter each to be made U- 'rnafchine work, instead of, as hereto 'ore, forming the wide bearing b securing togather twopieces of metal an then machinmg the same.

claim: 7

11. In. a desice-of the character described, the combination of a contact, a shaft upon which said contact rocks, a shifter also rock ing onsaid shaft and o eratively connected with. said contact,'a coi ed spring around the shaft-for energizing said shifter, and a cop-' trol'ler, having side membersx'and a bridge connecting them, said opposite sid'ezmembers being pivoted on said shaft on posite sides I of the .coiledspring, substant ally as described.

- 2. In a device of-the characterdescribed,

the combination of a shaft, a contact rocking thereon, a shifter operatively connected with said contact toirn art motion thereto, a coiled spring aroun the shaft, and a con troller for energizing said coiled spring, the

shifter having side members and abridge" connecting .them and having its opposite members ivoted upon the shaft on opposite sides of t e coiled spring to provide a long bearin for said shifter, substantially as describe 3. In a device of the character described,

the combination of a contact, a shaft upon which said 'conta5;t rocks, a shifter also rock- 'ing on said shaft and operatively connected with said contact, a coiled'spring around the shaft for energizing said sh1fter,-and-a controller also rocking on said shaft for energizing said coiled sprin said shifter and con troller each having si e members and a bridge connecting them, the coiled spring lyin within the side members ofthe shifter, an the latter 1 ing within the side members of the contro er, substantially as described.

7 4. In a device ofthe character described, the combination of a contact, a shaft upon which said" contact rocks, a shifter also rocking on said shaft and erativeiy connected with said contact, a mi ed s ring around the shaft for-energizing said shifter, a pair of hooks-alternately engaging the shifter to preventmovement of the same, and a controller energizing said'spri'ng and in its continued movement disengaging the engaging. hook from the shifter, substantially as described; Ina device of the character described, the combination ofa contact, a shaft 11 on which said contact is su ported, a shi aer rocking on said shaft and operatively eonlnected with said contact, a coiled spring around the shaft for energizing said shifter, a controller also rocking on said'shaft for energizing said spring, said shifter and controller each having side members and a bridge connecting them and, the said shifter and controller each having its side members pivoted uponthe shaft on the opposite sides of the (coiled spring;

In Witness whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

' 1 EVERETT COFFIN. Witnesses:

' FRANCIS M. WRIGHT,

Bnssrn GoRFrnKEL. 

